There is generally no requirement that written agreements in these circumstances need to be typed or handwritten. So an agreement for the sale of $600 in loose diamonds may be perfectly enforceable -- even if it was written with a ballpoint pen on Looney Tunes stationary.
Definition of install. 1  transitive verb. 2  1a : to place in an office or dignity by seating in a stall or official seatb : to induct into an office, rank, or order installed the new president. 3  2 : to establish in an indicated place, condition, or status installing herself in front of the fireplace.
Meaning: Put into an office or a position. Classified under: Verbs of political and social activities and events. Context example: the new president was installed immediately after the election. Troponyms (each of the following is one way to install): induct; invest; seat (place ceremoniously or formally in an office or position)